Proportional Representation: How UK Parliament Would Look 2026

Proportional representation could dramatically reshape the UK parliament, according to new analysis exclusively for the Guardian. The research by More in Common models how different voting systems would allocate seats based on current polling, revealing that no single party would win a majority under any proportional system. This shift could end the dominance of first past the post (FPTP) and usher in a more balanced, coalition-driven government.

What Is Proportional Representation?

Proportional representation (PR) is an electoral system where the share of seats in parliament closely matches the share of votes each party receives. Unlike FPTP, which often leads to majority governments on a minority of votes, PR reduces tactical voting and gives smaller parties a fairer voice. The three systems modelled—regional party list, single transferable vote (STV), and additional member system (AMS)—all aim to achieve this balance.

How FPTP Distorts Representation

Under the current first past the post system, Reform UK could win 46% of seats with just 28% of the vote, putting them within striking distance of a coalition. This distortion is a key criticism of FPTP: it amplifies the winner’s advantage and sidelines smaller parties. The More in Common data shows that PR would eliminate such overrepresentation, giving Reform only around 28% of seats under regional party list—matching their vote share.

Comparison of Voting Systems

The table illustrates how PR systems would prevent any single party from gaining a majority, forcing cross-party cooperation. Prime Minister Andy Burnham has signaled support for PR, joining other Labour figures and parties like the Liberal Democrats, Greens, SNP, and Plaid Cymru.

Key Takeaways

• PR ends the distortion of FPTP, where seat share doesn’t match vote share.
• Coalition governments become the norm under PR, reducing extreme policy swings.
• Voter choice increases, as tactical voting is no longer necessary.
• Public support for electoral reform has risen in recent years.

Why Does This Matter for Your Area?

The analysis allows you to see how your constituency would change under different systems. For example, areas with strong support for smaller parties would see a fairer seat allocation. This local data empowers voters to understand the real impact of reform.

FAQ

As the debate over electoral reform intensifies, understanding these models is crucial for every voter. Whether you support PR or prefer FPTP, the data highlights stark differences in how your vote is translated into power. Explore the full interactive map to see how your area would change—and join the conversation about Britain's electoral future.